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Guernsey Government Sites Taken Offline Amid Cybersecurity Flaw Alerts

Guernsey Government Sites Taken Offline Amid Cybersecurity Flaw Alerts

First seen 21 Oct 2026, 17:08 UTC • •
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ThreatCluster AI
ThreatCluster •October 21, 2026 at 17:41 UTC
  • •Guernsey government websites were taken offline due to cybersecurity vulnerabilities.
  • •No evidence of exploitation has been found, but precautionary measures are in place.
  • •A fix for the identified vulnerabilities has been issued by the UK's Cyber Security Centre.

The States of Guernsey has temporarily taken several websites offline as a precaution following international warnings about cybersecurity vulnerabilities in web software. Affected sites include the government portal, revenue service, and education site. Experts identified weaknesses in a programming language that powers many internet applications, prompting the States to act preemptively. They stated there is no evidence of any exploitation of their systems but are prioritizing public safety while a fix is applied and tested. The UK's Cyber Security Centre confirmed that a fix for the identified security issue has been issued, which could have allowed for memory corruption attacks. The websites will be restored once the updates are confirmed to be effective.

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Timeline

2026-10-21
Guernsey websites taken offline
The States of Guernsey took several websites offline as a precaution after warnings about cybersecurity flaws in web software.
BBC
2026-10-21
Security flaw identified
Experts identified vulnerabilities in a programming language that could allow for memory corruption attacks.
BBC
2026-10-21
Fix issued
The UK's Cyber Security Centre confirmed that a fix for the identified security issue has been released.
BBC

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Common questions

Which websites are affected?
The affected websites include the government site, revenue service portal, and post-16 education site.
Is there evidence of an attack?
No, the States of Guernsey stated there is no evidence that any of their websites have been compromised.
When will the websites be back online?
The websites will be restored once the updates are applied and confirmed to be effective.